First the male captives are separated from the women, and then killed off. Then the women are taken as sex slaves.This ancient manner of dealing with captives in Islam goes back to the time of Muhammad. Believing that Muhammad could do no wrong, the members of the Islamic State have revived this practice. That having sex with slaves is permissible in Islam is noted by members of the Islamic State. In the Quran 70:29-30, we read that a good Muslim is among "those who guard their chastity,except with their wives and the captives whom their right hands possess, for then they are not to be blamed." In the video below, we observe at the 34-second mark an Islamic State member reciting verse 70:30: "except with their wives and the captives whom their right hands possess, for then they are not to be blamed."

Islamic State finds justification in Quran (70:29-30 & 23:5-6) for staying chaste "except with their wives & the captives whom their right hands possess."